I'll chime in with Kenny and bigbill - I've got Bubs, they sound good, the bike flies, no mods needed other than the pipes.
Downside - they are a bit loud when you get on it and sound a little raspy when you're really on the throttle. At idle they're fine. I had some minor rust at the weld on the hangers (no need to swap out your hangers to get the pipes on - nice!) and that took about 2 minutes and a little steel wool to remedy.
If you ever need to call the factory the folks are great. Good pipes - doubt you'll be disappointed!
roadie